CN102324984A - Dispersion compensator and dispersion compensation system thereof - Google Patents
Dispersion compensator and dispersion compensation system thereof Download PDFInfo
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- CN102324984A CN102324984A CN201110198476A CN201110198476A CN102324984A CN 102324984 A CN102324984 A CN 102324984A CN 201110198476 A CN201110198476 A CN 201110198476A CN 201110198476 A CN201110198476 A CN 201110198476A CN 102324984 A CN102324984 A CN 102324984A
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Abstract
The invention provides a dispersion compensator and a dispersion compensation system thereof. The dispersion compensator comprises an optical collimator and an interference cavity, wherein the optical collimator comprises an optical fiber insertion core and a cylindrical lens in the coaxial arrangement; the cylindrical lens is arranged between the optical fiber insertion core and the interference cavity; the optical fiber insertion core is internally provided with mutually-parallel optical fibers; one end face of the optical fiber insertion core and one end face (opposite to the mentioned end face) of the cylindrical lens are a pair of mutually-parallel planes; the interference cavity is provided with a front reflecting surface and a back reflecting surface in the mutually-parallel arrangement; and a primary optical axis of the cylindrical lens passes through and is vertical to the front reflecting surface. The dispersion compensator is simple, small and exquisite in structure; and optical signals enter the cylindrical lens by the fibers for inputting signals and then are reflected back to the interference cavity by the cylindrical lens, and under the actions of the front and back reflecting surfaces of the interference cavity, the optical signals come into the cylindrical lens again and finally enter fibers for outputting the optical signals, thus the optical signals can realize the dispersion compensation after being subjected to refraction and reflection.
Description
Technical field
The present invention relates to technical field of optical fiber communication, relate in particular to a kind of dispersion compensator and Dispersion Compensation Systems thereof of the light signal that transmits in the optical fiber being carried out dispersion compensation.
Background technology
Along with the development of optical fiber telecommunications system to broadband, big capacity direction; Most widely used dense wave division multipurpose (Dense Wavelength Division Multiplexing in the trunk fiber communication at present; DWDM) technology; Because of its distinctive huge capacity receives concern more and more widely, and obtained significant progress.But; Raising along with optical signal transmission speed and capacity; The dispersion tolerance of optical fiber telecommunications system sharply reduces, and the simultaneously novel low-loss transmission optical fiber and the application of image intensifer also make optical fiber telecommunications system change the chromatic dispersion restriction system into from traditional loss limited system.
Chromatic dispersion is to postpone a kind of physical effect of causing because wavelength optical signals when in optical fiber, transmitting, produces different time because of group velocity is different.Dispersion phenomenon has a strong impact on the raising of lightray propagation speed and capacity.
At present; In order to solve the following two kinds of dispersion compensation technology of the general employing of dispersion phenomenon: a kind of is to adopt the dispersion compensating fiber technology, and it is to adopt dispersion compensating fiber (DCF, Dispersion Compensation Fiber) to process circle to be inserted in the fibre circuit; The chromatic dispersion band negative sign of this dispersion compensating fiber; With the circuit optical fiber opposite in sign, but it consumes luminous power and volume is big, can't the compensation of dispersion slope, can't satisfy the needs of current optical fiber telecommunications system; Another kind is to adopt linear chirp optical fiber grating technology (CFBG), though but linear chirp optical fiber grating compensation of dispersion slope, but it can only compensate single wavelength, and the tuning difficulty of chromatic dispersion is big, cost is high.
Summary of the invention
The present invention provide a kind of simple in structure, small and exquisite, light signal is carried out the dispersion compensator and the Dispersion Compensation Systems thereof of dispersion compensation, to solve the defective that exists in the prior art.
The present invention provides a kind of dispersion compensator; Comprise the optics collimator and the interference cavity that one in front and one in back are provided with; Said optics collimator comprises the fiber stub and the lens pillar of coaxial setting; Said lens pillar is provided with the optical fiber that is parallel to each other in the said fiber stub between said fiber stub and said interference cavity, said fiber stub and said lens pillar opposing end faces are a pair of plane that is parallel to each other; Have the front-reflection face and the back reflection face that are parallel to each other on the said interference cavity, the primary optical axis of said lens pillar passes and perpendicular to said front-reflection face.
The present invention also provides a kind of Dispersion Compensation Systems, comprises a plurality of above-mentioned dispersion compensators, and each said colorimetric compensation device is connected through optical fiber successively.
Dispersion compensator provided by the invention is simple in structure, small and exquisite; Light signal from the optical fiber input of signal input to lens pillar; After lens pillar refraction (purpose is to realize the effect of optically focused), be incident upon interference cavity again, under the reflex of the forward and backward reflecting surface of interference cavity, light signal directive lens pillar more also finally is incident to the optical fiber that light signal is exported; Light signal has been realized dispersion compensation after above-mentioned refraction, reflection, and then has improved lightray propagation speed and capacity.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the perspective view of dispersion compensator embodiment 1 of the present invention;
Fig. 2 is the complete section structural representation of dispersion compensator embodiment 1 of the present invention;
Fig. 3 is the complete section structural representation of dispersion compensator embodiment 2 of the present invention;
Fig. 4 is the modular construction sketch map that comprises the fiber stub and second straight tube;
Fig. 5 is the modular construction sketch map that comprises the 4th straight tube and interference cavity;
Fig. 6 is the modular construction sketch map that comprises the 3rd straight tube and lens pillar;
Fig. 7 is the modular construction sketch map that comprises cylinder and interference cavity;
Fig. 8 is the perspective view that is provided with the interference cavity position of heater and temperature sensor;
Fig. 9 is the perspective view that is provided with the cylinder position of heater and temperature sensor;
Figure 10 is the structural representation of Dispersion Compensation Systems embodiment of the present invention;
Figure 11 is a dispersion compensator of the present invention dispersion map at normal temperatures;
The dispersion map of the different dispersion measures that the change temperature obtained when Figure 12 used for Dispersion Compensation Systems embodiment of the present invention.
Reference numeral:
The 10-dispersion compensator; The 20-optics collimator; The many fiber stubs of 21-;
The 22-lens pillar; 211-optical fiber; 212-glass lock pin;
2123-light exit side face; 223-receives end face; 225-lens transmissive end face;
The 30-interference cavity; 301-front-reflection face; 302-back reflection face;
The 31-heating unit; The 311-heater; The 312-temperature sensor;
The 28-gap; 40-first straight tube; 41-second straight tube;
42-the 3rd straight tube; 43-the 4th straight tube; 401,431,441-front end face;
415,432, behind the 442-51,52,531,532-44-cylinder.
End face; Assembly;
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Like Fig. 1, shown in 2, the embodiment 1 of dispersion compensator 10 of the present invention comprises the optics collimator 20 and interference cavity 30 (side that light signal gets into this dispersion compensator 10 among this paper is for before being, and opposite side is the back) that one in front and one in back are provided with.
Wherein, optics collimator 20 comprises many fiber stubs 21 and lens pillar 22.Many fiber stubs 21 and lens pillar 22 coaxial settings.Many fiber stubs 21 comprise glass lock pin 212, and its central shaft of glass lock pin 212 upper edges is provided with through hole, at this through hole internal fixation two optical fiber 211, these two optical fiber 211 are parallel to each other.Wherein, an optical fiber 211 is the light signal input optical fibre, and another optical fiber 211 is the light signal output optical fibre.Glass lock pin 212 is a pair of inclined-planes that tilt with respect to lens pillar 22 primary optical axis with lens pillar 22 opposing end faces; And two inclined-planes are parallel to each other; Here adopt a pair of inclined-plane that is parallel to each other to reduce the return loss of end face, reduce the interference of reverberation light signal.The said inclined-plane that is positioned on the glass lock pin 212 is a light exit side face 2123; The end of above-mentioned optical fiber 211 1 ends is concordant with light exit side face 2123; The said inclined-plane that is positioned on the lens pillar 22 is reception end face 223; Between light exit side face 2123 and reception end face 223, be provided with small gap 28, this gap 28 be set be used for separating light exit side face 2123 and receive end face 223, guarantee the normal propagation of light.The other end of lens pillar 22 is a lens transmissive end face 225, and this lens transmissive end face 225 is the surface of spherical lens, and promptly this moment, lens pillar 22 was a spherical lens.Certainly, lens transmissive end face 225 also can be the plane, and then this moment, lens pillar adopted self-focus lens.
One second straight tube of suit, 41, the second straight tubes 41 are glass tube in the outside of glass lock pin 212, and end face 415 is a joint face thereafter.One the 3rd straight tube of suit, 42, the three straight tubes 42 are glass tube in the outside of lens pillar 22.One first straight tube of outside suit, 40, the first straight tubes 40 at the 3rd straight tube 42 are glass tube, and its front end face 401 is similarly joint face.Between the joint face of the joint face of second straight tube 41 and first straight tube 40, smearing binding agent is fixed together first straight tube 40 and second straight tube 41.
In first straight tube 40, also having fixedly mounted one the 4th straight tube, 43, the four straight tubes 43 is glass tube, and the 4th straight tube 43 is positioned at the rear of lens pillar 22, and the front end face 431 and the lens transmissive end face 225 of the 4th straight tube 43 are oppositely arranged.Described interference cavity 30 is fixedly mounted on the rear end face of the 4th straight tube 43.Interference cavity 30 has the front-reflection face 301 and back reflection face 302 that is parallel to each other; And the primary optical axis of lens pillar 22 is through front-reflection face 301 and back reflection face 302; And vertical with front-reflection face 301 with back reflection face 302, front-reflection face 301 reflect Fresnel reflection from dielectric film technology or interference cavity 30 matrix.On front-reflection face 301, be coated with the partial reflection film, the reflectivity of partial reflection film is between 10%～60%; Be coated with total reflection film on the back reflection face 302, partial reflection film and total reflection film be set realized compensation chromatic dispersion gradient.This dispersion compensator 10 chromatic dispersion at normal temperatures is shown in figure 11 with the curve of wavelength variations, and visible by figure, the peak value chromatic dispersion of this dispersion compensator 10 can reach 280ps/nm.
This dispersion compensator is in when assembling, at first, the inwall of the 3rd straight tube 42 is coated with last layer glue, then lens pillar 22 is inserted in the 3rd straight tube 42, through above-mentioned glue the 3rd straight tube 42 is fixed as assembly shown in Figure 6 52 with lens pillar 22; Secondly; Be coated with last layer glue on the rear end face 432 with the 4th straight tube 43; Interference cavity 30 is bonded on the 4th straight tube 43 forming assembly shown in Figure 5 531 through its front-reflection face 301, and is bonded in the heating unit of forming by heater 311 and temperature sensor 312 as shown in Figure 8 on the back reflection face of interference cavity 30; Then; The inwall of first straight tube 40 is coated with last layer glue; Respectively assembly 52 and assembly 531 are inserted in first straight tube 40, and guarantee that the lens transmissive end face 225 of lens pillar 22 and the distance of front-reflection face are the focal length of above-mentioned spherical lens, so that whole junction loss is minimum; At last; Be coated with last layer glue on the inwall with second straight tube 41; The glass lock pin that is fixed with two parallel optical fiber 211 212 is inserted second straight tube 41, be fixed as assembly shown in Figure 4 51, adjust the angle and distance of the outgoing end face 2123 of glass lock pin 212 through optic test subsequently with respect to the reception end face of lens pillar through above-mentioned glue; And gluing is bonded in it on front end face of first glass tube on the rear end face 415 of second straight tube 41, so far accomplishes the assembling of this dispersion compensator.
As shown in Figure 3, the complete section structural representation of dispersion compensator 10 another embodiment of the present invention, the difference of itself and the foregoing description is; Four optical fiber 211 have been fixedly connected in the glass lock pin 212; These four optical fiber 211 are parallel to each other in glass lock pin 212, and the structure that on distributing position, assumes diamond in shape, and one in these four optical fiber is the light signal input optical fibre; Another root is the light signal output optical fibre, and the end of itself and two optical fiber links together.Multifiber 211 (present embodiment is provided with four, but not only is confined to be provided with four) is set in glass lock pin 212, and then this dispersion compensator has just become a multi bri device, can obtain higher dispersion measure like this.Adorn one at the back end plug of first straight tube and seen assembly shown in Figure 9 in addition; This assembly comprises a cylinder 44; This cylinder 44 is a glass cylinder; Bonding interference cavity 30 constitutes assembly 532 shown in Figure 7 on the front end face 441 of cylinder 44, the bonding heating unit of being made up of heater 311 and temperature sensor 312 31 on the rear end face 442.In this embodiment, lens pillar is a self-focus lens, and promptly its lens transmissive end face 225 is the plane.Certainly, lens pillar also can adopt the spherical lens of the foregoing description.
The dispersion compensator of this embodiment is similar to the aforementioned embodiment in assembling, repeats no more here.
Shown in figure 10; The structural representation of Dispersion Compensation Systems embodiment of the present invention; The dispersion compensator 10 that comprises a plurality of above-mentioned arbitrary embodiment; And a plurality of dispersion compensators 10 are connected through optical fiber and are compensated with the chromatic dispersion to light signal, and the temperature of the interference cavity through changing dispersive compensator 10 can obtain dispersion measure shown in figure 12 dispersion map for+500ps/nm and-500ps/nm.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (11)
1. dispersion compensator; It is characterized in that; Comprise the optics collimator and the interference cavity that one in front and one in back are provided with, said optics collimator comprises the fiber stub and the lens pillar of coaxial setting, and said lens pillar is between said fiber stub and said interference cavity; Be provided with the optical fiber that is parallel to each other in the said fiber stub; Said fiber stub and said lens pillar opposing end faces are a pair of plane that is parallel to each other, and have the front-reflection face and the back reflection face that are parallel to each other on the said interference cavity, and the primary optical axis of said lens pillar passes and perpendicular to said front-reflection face.
2. dispersion compensator according to claim 1 is characterized in that the rear of said back reflection face fixedly installs having heaters.
3. dispersion compensator according to claim 1 is characterized in that said front-reflection face is provided with the partial reflection film.
4. dispersion compensator according to claim 1 is characterized in that, said back reflection face is provided with total reflection film.
5. dispersion compensator according to claim 1 is characterized in that, the end face of said optical fiber one end is concordant with the said plane on the said fiber stub.
6. dispersion compensator according to claim 2 is characterized in that the rear of said back reflection face also is set with temperature sensor.
7. dispersion compensator according to claim 6; It is characterized in that the outside of said lens pillar is set with first straight tube, the outside of said fiber stub is set with second straight tube; Said first straight tube is fixedly connected with said second straight tube; Be provided with the 4th straight tube in said first straight tube, said interference cavity is fixed on the rear end face of said the 4th straight tube, and said heater and said temperature sensor all are fixedly set on the said back reflection face.
8. dispersion compensator according to claim 6; It is characterized in that the outside of said lens pillar is set with first straight tube, the outside of said fiber stub is set with second straight tube; Said first straight tube is fixedly connected with said second straight tube; Be provided with cylinder in said first straight tube, said interference cavity is fixed on the front end face of said cylinder, and said heater and said temperature sensor all are fixedly set on the rear end face of said cylinder.
9. according to the arbitrary described dispersion compensator of claim 1-8, it is characterized in that two said planes are the inclined-plane that tilts with respect to said lens pillar primary optical axis.
10. dispersion compensator according to claim 9 is characterized in that, is provided with the gap between the two said inclined-planes.
11. a Dispersion Compensation Systems is characterized in that, comprises a plurality ofly like the arbitrary described dispersion compensator of claim 1-10, each said colorimetric compensation device is connected through optical fiber successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110198476A CN102324984A (en) | 2011-07-15 | 2011-07-15 | Dispersion compensator and dispersion compensation system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110198476A CN102324984A (en) | 2011-07-15 | 2011-07-15 | Dispersion compensator and dispersion compensation system thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259595A (en) * | 2013-04-08 | 2013-08-21 | 诺方（哈尔滨）科技股份有限公司 | Dispersion compensation device for simultaneously compensating optical fiber dispersion and dispersion slope |
| CN109613653A (en) * | 2018-12-10 | 2019-04-12 | 高安天孚光电技术有限公司 | A kind of collimator assembly |
| CN109983718A (en) * | 2016-11-22 | 2019-07-05 | 华为技术有限公司 | A kind of dispersion compensation method and device |
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| CN201508446U (en) * | 2009-09-04 | 2010-06-16 | 昂纳信息技术（深圳）有限公司 | Adjustable dispersion compensation device of integrated optical fiber |
| CN201576144U (en) * | 2009-08-07 | 2010-09-08 | 昂纳信息技术（深圳）有限公司 | Adjustable dispersion compensation device |
| US20110032619A1 (en) * | 2009-08-07 | 2011-02-10 | O-Net Communications (Shenzhen) Limited | Tunable chromatic dispersion compensation device and method |
| CN101989880A (en) * | 2009-08-07 | 2011-03-23 | 昂纳信息技术（深圳）有限公司 | Tunable dispersion compensation device and tuning method |
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2011
- 2011-07-15 CN CN201110198476A patent/CN102324984A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201576144U (en) * | 2009-08-07 | 2010-09-08 | 昂纳信息技术（深圳）有限公司 | Adjustable dispersion compensation device |
| US20110032619A1 (en) * | 2009-08-07 | 2011-02-10 | O-Net Communications (Shenzhen) Limited | Tunable chromatic dispersion compensation device and method |
| CN101989880A (en) * | 2009-08-07 | 2011-03-23 | 昂纳信息技术（深圳）有限公司 | Tunable dispersion compensation device and tuning method |
| CN201508446U (en) * | 2009-09-04 | 2010-06-16 | 昂纳信息技术（深圳）有限公司 | Adjustable dispersion compensation device of integrated optical fiber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259595A (en) * | 2013-04-08 | 2013-08-21 | 诺方（哈尔滨）科技股份有限公司 | Dispersion compensation device for simultaneously compensating optical fiber dispersion and dispersion slope |
| CN109983718A (en) * | 2016-11-22 | 2019-07-05 | 华为技术有限公司 | A kind of dispersion compensation method and device |
| CN109613653A (en) * | 2018-12-10 | 2019-04-12 | 高安天孚光电技术有限公司 | A kind of collimator assembly |
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Address after: No. 8, East Lake street, Yingbin Road, Harbin hi tech Development Zone, Heilongjiang, China Applicant after: Connaught square (Harbin) Polytron Technologies Inc Address before: 150078 No. 8 East Lake Road, Yingbin Road, Harbin hi tech Development Zone, Heilongjiang, China Applicant before: Harbin Nuofang Photoelectric Technology Co., Ltd. |
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Application publication date: 20120118 |